Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1d42dc0079dd26…

MALICIOUS

PDF

75.2 KB Created: 2021-07-18 05:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0685e1ce90b4a00811ea62e4b7e54d56 SHA-1: eb2b69dfa418fe2a72be8a1dddba78e4a4a23180 SHA-256: af1d42dc0079dd26a78577593be1bc9ce81e4d7e8abcbbcfbf5c92cf481bd110
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains a link farm with numerous URLs pointing to disposable hosting and compromised WordPress sites, designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/tedevuxomulat.pdf In PDF document text
    • http://erex.hu/upload/file/97176600552.pdfIn PDF document text
    • http://www.moyekolodin.com/files/5322038144.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d9f80025c---zifefurupijexu.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/41574572009.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/n3c6hibei8rvbbpoph2eps6g86/66300643283.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/666ec3fb22f52e46d455300ec3501f08/19227165553.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210718_05EA5EBE38C4D5A8.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/jedepudufijebeful.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/09ede7f2f5e2d3129d73dfce5f9f99ad/10316415220.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160719a28d2e62---towoxet.pdfIn PDF document text
    • http://arablift.net/userfiles/file/vuviwivumabipugot.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8801da098---85602960627.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a325589269d---80689651035.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/01s4pa6v06r8vuv421vq43o4vi/wimuzalonabina.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/66028759505.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9396de7115---98761937779.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/zegobulubifegojuzifebite.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/sevapipizigarotitif.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4faf1b7ae---53185144405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=manhattan+prep+gre+reading+comprehension+and+essays+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCC 11128 bytes
SHA-256: 7e51a7d68414670ab17e726e871aaa7fc3625c805fd82ed7b863831880b184ea
font_01_sfnt_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 16724 bytes
SHA-256: 61fa7a0fb46d77bd5b96e7a3d12fec58ff3c8c747510298ef945143547e625e3
font_02_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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